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        <title>Document</title>
        <style>
            .bg-red{
                background-color: #f00;
            }
            .box-50-50{
                width: 50px;
                height: 50px;
            }
            .box-50-100{
                width: 50px;
                height: 100px;
            }
            .box-100-50{
                width: 100px;
                height: 50px;
            }
            .bdrs-50{
                border-radius: 50%;
            }
            .bdrs-test{
                border-top-left-radius: 50px 25px;
                border-top-right-radius: 50px 25px;
                /*border-bottom-right-radius: 4em 0.5em;
                border-bottom-left-radius: 1em 3em;*/
            }
            .bdrs-test1{
                border-top-left-radius: 50px 25px;
                border-top-right-radius: 50px 25px;
                border-bottom-right-radius: 50px 25px;
                /*border-bottom-left-radius: 1em 3em;*/
            }
            .bdrs-test2{
                border-top-left-radius: 50px 25px;
                border-top-right-radius: 50px 25px;
                border-bottom-right-radius: 50px 25px;
                border-bottom-left-radius: 50px 25px;
            }
            .bdrs-hv{
                border-radius: 2em 1em 4em / 0.5em 3em;
            }
            .bdrs-hv1{
                border-top-left-radius: 2em 0.5em;
                border-top-right-radius: 1em 3em;
                border-bottom-right-radius: 4em 0.5em;
                border-bottom-left-radius: 1em 3em;
            }
        </style>
    </head>
    <body>
        <h1>https://blog.csdn.net/liuyan19891230/article/details/50724630/</h1>
        <p><a href="https://blog.csdn.net/liuyan19891230/article/details/50724630/">来源</a></p>
        <div class="bg-red box-50-50 bdrs-50"></div>
        <div class="bg-red box-100-50 bdrs-50"></div>
        <div class="bg-red box-50-100 bdrs-50"></div>
        <div class="bg-red box-100-50 bdrs-test"></div>
        <div class="bg-red box-100-50 bdrs-test1"></div>
        <div class="bg-red box-100-50 bdrs-test2"></div>
        <div class="bg-red box-100-50 bdrs-hv"></div>
        <div class="bg-red box-100-50 bdrs-hv1"></div>
    </body>
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